Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 731, Issue -, Pages 662-666Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.08.248
Keywords
Amorphous composite coating; FeCrCoNiSiB high-entropy alloy powder; Laser cladding; High-temperature wear behavior
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Funding
- Natural Science Foundation of Shandong Province [ZR2016EEQ03]
- Open Project Program of the State Key Lab of CADCG [lzsy-03]
- Natural Scientific Research Innovation Foundation in HIT [HIT.NSRIF.201703]
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A novel amorphous composite coating was synthesized successfully on low carbon steel by laser cladding FeCrCoNiSiB high-entropy self-fluxed alloy powder. The combination of impact wear and XRD was adopted as a novel method to observe the crystalline phases of the coating. The research focused on the microstructure and high-temperature wear behavior of the two characteristic layers in the fabricated coatings. The amorphous/crystalline layer as the upper layer was composed of amorphous phase and face-centered cubic gamma(Fe, Ni) phase, while body-centered cubic (Co, Fe) solid solution phases with carbides and borides precipitates preferred to appear in the bottom layer. The volume fraction of amorphous phase was approximately 49% in the upper layer, which gave birth to a novel wear mechanism and remarkably improve the wear resistance in high-temperature service environment. (C) 2017 Published by Elsevier B.V.
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